diff --git a/lib/exporter/verify.integrity.test.ts b/lib/exporter/verify.integrity.test.ts
index cbbf717..c7c3a0e 100644
--- a/lib/exporter/verify.integrity.test.ts
+++ b/lib/exporter/verify.integrity.test.ts
@@ -20,6 +20,13 @@ describe('verifyIntegrity', () => {
     const res = verifyIntegrity(extras, assets)
     expect(res.ok).toBe(true)
     expect(res.errors.length).toBe(0)
+    // summary
+    const parsedIdx = JSON.parse(td(idx)) as { entries: Array<{ path: string }> }
+    expect(res.summary.total).toBe(parsedIdx.entries.length)
+    expect(res.summary.missing).toBe(0)
+    expect(res.summary.integrityMismatches).toBe(0)
+    expect(res.summary.sizeMismatches).toBe(0)
+    expect(res.summary.bundleHashMismatch).toBe(false)
     // sanity: index contains both paths
     const parsed = JSON.parse(td(idx)) as { entries: Array<{ path: string }> }
     const paths = parsed.entries.map(e => e.path)
@@ -42,6 +49,7 @@ describe('verifyIntegrity', () => {
     const res = verifyIntegrity({ 'assets.integrity.index.json': idx }, assets)
     expect(res.ok).toBe(false)
     expect(res.errors.some((e: string) => e.includes(somePath) && e.toLowerCase().includes('mismatch'))).toBe(true)
+    expect(res.summary.integrityMismatches).toBeGreaterThanOrEqual(1)
   })
 
   it('detects missing entry or missing asset referenced by index', async () => {
@@ -58,6 +66,7 @@ describe('verifyIntegrity', () => {
     const res1 = verifyIntegrity({ 'assets.integrity.index.json': idx2 }, assets)
     expect(res1.ok).toBe(false)
     expect(res1.errors.some((e: string) => e.toLowerCase().includes('bundlehash'))).toBe(true)
+    expect(res1.summary.bundleHashMismatch).toBe(true)
 
     // reference a missing path in index
     obj.entries.unshift({ path: 'assets/missing.bin', integrity: 'sha256-AAAA' })
@@ -65,6 +74,7 @@ describe('verifyIntegrity', () => {
     const res2 = verifyIntegrity({ 'assets.integrity.index.json': idx3 }, assets)
     expect(res2.ok).toBe(false)
     expect(res2.errors.some((e: string) => e.includes('assets/missing.bin') && e.toLowerCase().includes('missing'))).toBe(true)
+    expect(res2.summary.missing).toBeGreaterThanOrEqual(1)
     // keep lints happy
     expect(removed).toBeTruthy()
   })
diff --git a/lib/exporter/verify.ts b/lib/exporter/verify.ts
index 69e68b1..a769df0 100644
--- a/lib/exporter/verify.ts
+++ b/lib/exporter/verify.ts
@@ -1,4 +1,14 @@
-export type VerifyResult = { ok: boolean; errors: string[] }
+export type VerifyResult = {
+  ok: boolean;
+  errors: string[];
+  summary: {
+    total: number;
+    missing: number;
+    integrityMismatches: number;
+    sizeMismatches: number;
+    bundleHashMismatch: boolean;
+  };
+}
 
 // Minimal synchronous SHA-256 implementation returning base64 string.
 function sha256Base64(bytes: Uint8Array): string {
@@ -81,30 +91,36 @@ export function verifyIntegrity(
   const errors: string[] = []
   const key = 'assets.integrity.index.json'
   if (!Object.prototype.hasOwnProperty.call(extras, key)) {
-    return { ok: false, errors: ['Missing assets.integrity.index.json in extras'] }
+    return { ok: false, errors: ['Missing assets.integrity.index.json in extras'], summary: { total: 0, missing: 0, integrityMismatches: 0, sizeMismatches: 0, bundleHashMismatch: false } }
   }
   let parsed: { entries: Array<{ path: string; integrity: string; size?: number }>; bundleHash: string }
   try {
     parsed = JSON.parse(new TextDecoder().decode(extras[key]))
   } catch {
-    return { ok: false, errors: ['Invalid assets.integrity.index.json JSON'] }
+    return { ok: false, errors: ['Invalid assets.integrity.index.json JSON'], summary: { total: 0, missing: 0, integrityMismatches: 0, sizeMismatches: 0, bundleHashMismatch: false } }
   }
   // verify each entry exists and integrity matches
   const recomputedLines: string[] = []
+  let missing = 0
+  let integrityMismatches = 0
+  let sizeMismatches = 0
   for (const e of parsed.entries) {
     const bytes = assets[e.path]
     if (!bytes) {
       errors.push(`Missing asset for path in integrity index: ${e.path}`)
+      missing++
       continue
     }
     // optional size check when present in index
     if (typeof e.size === 'number' && e.size !== bytes.length) {
       errors.push(`Size mismatch for ${e.path}: expected ${e.size}, got ${bytes.length}`)
+      sizeMismatches++
     }
     const b64 = sha256Base64(bytes)
     const integ = `sha256-${b64}`
     if (integ !== e.integrity) {
       errors.push(`Integrity mismatch for ${e.path}`)
+      integrityMismatches++
     }
     recomputedLines.push(e.path)
     recomputedLines.push(integ)
@@ -112,8 +128,19 @@ export function verifyIntegrity(
   // recompute bundle hash
   const joined = new TextEncoder().encode(recomputedLines.join('\n'))
   const bundle = `sha256-${sha256Base64(joined)}`
-  if (bundle !== parsed.bundleHash) {
+  const bundleHashMismatch = bundle !== parsed.bundleHash
+  if (bundleHashMismatch) {
     errors.push('BundleHash mismatch')
   }
-  return { ok: errors.length === 0, errors }
+  return {
+    ok: errors.length === 0,
+    errors,
+    summary: {
+      total: parsed.entries.length,
+      missing,
+      integrityMismatches,
+      sizeMismatches,
+      bundleHashMismatch,
+    },
+  }
 }